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36 id 1Qrn6h-0006OH-EB; Fri, 12 Aug 2011 04:28:43 -0400
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37 Date: Fri, 12 Aug 2011 04:28:43 -0400
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38 From: Austin Clements <amdragon@MIT.EDU>
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39 To: Sebastian Spaeth <Sebastian@sspaeth.de>
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40 Subject: Re: [PATCH v2] emacs: bad regexp @ `notmuch-search-process-filter'
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41 Message-ID: <20110812082843.GB21339@mit.edu>
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79 Quoth Sebastian Spaeth on Aug 12 at 10:07 am:
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80 > On Mon, 11 Jul 2011 17:05:32 -0400, Austin Clements <amdragon@MIT.EDU> wrote:
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81 > > So what would be a good format? One possibility would be to
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82 > > NULL-delimit the query part; as distasteful as I find that, this part
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83 > > of the search output isn't meant for user consumption. Though I fear
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84 > > this is endemic to the dual role the search output currently plays as
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85 > > both user and computer readable.
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87 > Perhaps we take a queue from xargs and have a command line switch for \n
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92 > Input items are terminated by a null character instead of by
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93 > whitespace, and the quotes and backslash are not special (every
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94 > character is taken lit- erally).
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96 This was one of the approaches I considered, but given that JSON
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97 parsing (with my optimized json.el) is nearly as fast as regexp-based
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98 parsing (which would also be the fastest way to parse \0-separated
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99 output) and is flexible, robust, and structured (unlike any simple
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100 delimited text format), I concluded we should just go with JSON. If
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101 we care about speed enough to introduce another format, I'd propose
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102 S-expressions over a new text format, since they double parsing
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103 performance compared to text, have the same structural benefits as
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104 JSON, and JSON and S-expressions could even share the same formatting
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105 code (so there's no chance of representation divergence).
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107 BTW, reviving the JSON search parser is on my shortlist. I should
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108 also bundle up my optimized json.el, since it should seriously boost
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109 the performance of notmuch-show, too.
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